/*
 * Copyright &copy; 2010-2011 Rebecca G. Bettencourt / Kreative Software
 * <p>
 * The contents of this file are subject to the Mozilla Public License
 * Version 1.1 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * <a href="http://www.mozilla.org/MPL/">http://www.mozilla.org/MPL/</a>
 * <p>
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
 * License for the specific language governing rights and limitations
 * under the License.
 * <p>
 * Alternatively, the contents of this file may be used under the terms
 * of the GNU Lesser General Public License (the "LGPL License"), in which
 * case the provisions of LGPL License are applicable instead of those
 * above. If you wish to allow use of your version of this file only
 * under the terms of the LGPL License and not to allow others to use
 * your version of this file under the MPL, indicate your decision by
 * deleting the provisions above and replace them with the notice and
 * other provisions required by the LGPL License. If you do not delete
 * the provisions above, a recipient may use your version of this file
 * under either the MPL or the LGPL License.
 * @since PowerPaint 1.0
 * @author Rebecca G. Bettencourt, Kreative Software
 */

package com.kreative.paint.filter;

public class WireWorldFilter extends CellularAutomatonFilter {
	private static final int EMPTY = 0;
	private static final int HEAD = 1;
	private static final int TAIL = 2;
	private static final int WIRE = 3;
	public int[] getStateColors() {
		return new int[]{
				0xFF000000, // EMPTY
				0xFF0080FF, // HEAD
				0xFFFF4000, // TAIL
				0xFFFFD700  // WIRE
		};
	}
	public int getNeighborhoodXStart() { return -1; }
	public int getNeighborhoodXEnd() { return 1; }
	public int getNeighborhoodYStart() { return -1; }
	public int getNeighborhoodYEnd() { return 1; }
	public int getNextState(int[][] prevState) {
		switch (prevState[1][1]) {
		case EMPTY: return EMPTY;
		case HEAD: return TAIL;
		case TAIL: return WIRE;
		case WIRE:
			int cnt = 0;
			for (int[] r : prevState) {
				for (int i : r) {
					if (i == HEAD) cnt++;
				}
			}
			return (cnt == 1 || cnt == 2) ? HEAD : WIRE;
		default: return EMPTY;
		}
	}
}
